* {
  box-sizing: border-box;
}

html, body, #app {
  margin: 0;
  height: 100%;
}

textarea {
  border: none;
  overflow: auto;
  outline: none;

  -webkit-box-shadow: none;
  -moz-box-shadow: none;
  box-shadow: none;

  resize: none; /*remove the resize handle on the bottom right*/
}

/* Button 基础样式 */
button {
  border: none;
  outline: none;
  cursor: pointer;
  padding: 0;
  background: none;
}
